Republican presidential candidate Donald Trump speaks at a rally in Lynden, Wash., on May 7, 2016. Up to now, he has largely self-funded his campaign, but winning the presidency will require many big financial contributions from others.
Republican presidential candidate Donald Trump speaks at a rally in Lynden, Wash., on May 7, 2016. Up to now, he has largely self-funded his campaign, but winning the presidency will require many big financial contributions from others. Elaine Thompson The Associated Press
Republican presidential candidate Donald Trump speaks at a rally in Lynden, Wash., on May 7, 2016. Up to now, he has largely self-funded his campaign, but winning the presidency will require many big financial contributions from others. Elaine Thompson The Associated Press